I doubt that.
Sera is a racist, and self-depricating. She hates elves on the basis of them being elves. She hates mages on the basis of them being mages. These are immutable qualities.
Being 'elfy' isn't an immutable quality. It's a culture, and culture is both assumed and chosen.
This is the problem that Thedas runs into quite frequently, by equating race and culture. It's funny how squarely Sten lampoons it in his 'elves are those that excel at poverty' party banter.
Therefore her distrust and dislike of elves and mages is *nearly* akin to her being an Uncle Tom. Just think in real life if Sera was just an Asian and gave people sh*t for wanting to learn things about their Asian heritage. Put in that light, she is undeniably racist, and a bigot.
When she says that she distrusts mages, but says that YOU are OK, that's pretty much like saying, "Oh well, I don't like gay people, but I guess you're ok for a gay person."
You're closer to the point on the mage grounds, but the 'mage is race' analogy breaks down because the differences are, well, real. And justifiably scary.
Uncle Tom ideology, or American Racism, had an ideological basis on the supposedly innate differences between whites and blacks- mental, physical, even spiritual disreprencies that ultimately have proven to be imaginary. Blacks could learn just as well, fight just as well, and were morally/ethically no different than whites of similar situation. The differences were superficial.
Magic... is hardly a superficial difference. It has incomparable advantages and characteristics. It is a mental experience and perspective mundanes never go through. And the spiritual dimension is, well, exceedingly relevant and often scary to people in Thedas.
Sera's discrimination towards mages is far closer to anti-mutant racism in the X-Men franchise- mutants (mages) are real, mysterious, and frequently dangerous even when not outright malevolent. It's fear of the weak towards the stronger- which is about as far you can get discrimination-wise from historic American racism of the Uncle Tom sort.